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| Abstract No.: |
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| Title: |
An effect of low pressure gas dynamic spray on microcorrosion behavior of Al alloys
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| Authors: |
Volf Leshchynsky / University of Windsor, Canada
Elena Maeva / University of Windsor, Canada
Mordehay Schlesinger/ University of Windsor, Canada
Roman Maev/ University of Windsor, Canada
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| Abstract: |
The corrosion behavior of Al alloys, produced by cast and powder (Low Pressure Gas Dynamic Spray) technologies in 3% sodium chloride solution was examined from the viewpoint of localized corrosion.. The susceptibility to localized corrosion is known to be strongly affected by intermetallic phases present in the alloy?s microstructure. The influence of individual cathodic and anodic intermetallic phases was investigated by using a microelectrochemical setup and by electrochemical methods. The scanning electron microscopy, transmission electron microscopy and X-ray microanalysis data reveal that the cast and powdered alloys experience localized corrosion due to presence of the intermetallic phases which results in the micro-corrosion effects such as exfoliation corrosion, intergranular or crevice corrosion, and most severely pitting. Cast material has lower corrosion properties because of the higher heterogeneity of the structure as compared with powder sprayed composite.
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